How does cid make power?

Per another thread on this forum, if someone asked for a guess on power output, and didn't tell you the cubic inch, but told you everything else.... could you give a decent guess? I couldn't.

(I've got an engine with 11 to 1, ported aluminum heads, 750 holley dp, solid lifter 250° at .050 cam, edelbrock intake, 1 7/8 headers, pulls cleanly to 6500. How much horsepower do I have?)

What's the first question?